[Fusion] Add defer support

AGENTS.md

@@ -56,6 +56,7 @@ dotnet test src/HotChocolate/Fusion
 - Use test naming format: `Method_Should_Outcome_When_Condition`.
 - Do not write vacuous assertions (`Assert.NotNull` alone is not a complete test).
 - If a test requires excessive stubs and reflection, use a more appropriate test tier.
+- Do not use em dash style sentences in docs, comments, or XML documentation. Use commas, periods, parentheses, or colons instead.
 
 ### Testing
 

CLAUDE.md

@@ -47,11 +47,12 @@ dotnet test src/HotChocolate/Fusion
 
 ### C# / .NET
 
-- Always use curly braces for loops and conditionals — no exceptions
+- Always use curly braces for loops and conditionals, no exceptions
 - File-scoped namespaces, 4-space indent
 - Test naming: `Method_Should_Outcome_When_Condition`
 - No vacuous assertions (`Assert.NotNull` alone is not a test)
 - If you need 8 stubs + reflection, you're at the wrong test tier
+- Do not use em dash style sentences in docs, comments, or XML documentation. Use commas, periods, parentheses, or colons instead.
 
 ### Testing